The Russian submarine was pursued for three days by NATO planes and ships.

The Russian diesel-electric submarine "Rostov-on-Don", while making the transition from the Baltic to the Mediterranean, was pursued for several days in a row by NATO ships and aircraft. Due to the transition of a Russian submarine, even an American aircraft carrier did not dare to pass Gibraltar, apparently believing that Russian sailors could easily work out an attack on the entire aircraft carrier strike group, revealing weaknesses in the naval formation.

Earlier, the Russian submarine "Rostov-on-Don" was already pursued by a British warship while passing through the English Channel, however, for unknown reasons, in preparation for the passage through the Bosphorus, the surveillance of the Russian diesel-electric submarine was intensified, although the submarine itself was on the surface nor did she express any aggression against civilian and naval vessels.

From the air, the Russian diesel-electric submarine "Rostov-on-Don" was constantly monitored by American patrol anti-submarine aircraft Boeing P-8A Poseidon, and from the sea several NATO warships watched the movement of the submarine.

Noteworthy is the fact that the passage of Gibraltar was also awaited by the American aircraft carrier - after the successful passage of the Russian submarine, it also began to move, which indicates that the Russian submarine fleet literally put the entire Alliance on its ears.